WCU SAE Baja

I joined WCU's Baja first club team in 2014. I got hands on fabrication experience building the chassis as a member my first year. Later on took the lead role of Powertrain, where I designed the powertrain packaging layout using PTC Creo. I led new team members in the fabrication with a CNC laser cutting, machine shop equipment, and specified COTS hardware to use.

I self taught myself to conduct stress analysis using ANSYS workbench where I recreated the failure point of the suspension components that was damaged in the competition races.

Some of the cad models are upload to my cad portfolio on grabcad: https://grabcad.com/library/sae-baja-powertrain-assembly-1

Powertrain packaging

Initial design, Imported Engine, differential, and CVT CAD files.

Engine is Brigg Stratton 10 HP

Differential is DINAN H12

CVT is CVTech

Two deigns where considered, small wheel base vs lower CG.

Back view to check alignment, lower CG was chosen, and center differential drove placement of the rest of the powertrain.

Final result was fabricated.

challenged face was no FEA was conducted, design changes were required to overcome interface from version 1, and power output was below desired.

Revisiting the project:

If I were to redesign the mounting bracket: I would create this below. The service windows allows access to mounting the the engine.

FEA

I being taught Ansys in class I conduct more advance FEA with WCU BAJA, to study torsion and bending of the chassis

I drew the chassis using PTC Creo Sweeps in surfaces, allowing ansys geometry to power the thickness calculations, I constrained the rear chassis with help from the professor. I then applied forces loads to the chassis where the suspension point would connect.

Page updated

Google Sites

Report abuse